Managing CA-Signed Certificates

Transcription

1 Managing CA-Signed Certificates T.Rob Wyatt, IoPT Consulting

2 Managing CA Certificates for MQ - Intermediate So you want to enable SSL on your MQ channels using a commercial Certificate Authority? Unfortunately, very few CAs provide documentation relevant to MQ. This session explains the certificate features and options offered by commercial CAs, how these interact with MQ, and which to choose. The session ends with a step-by-step implementation and diagnostic process that will slash your deployment effort.

3 Agenda A word about Anatomy of a certificate How IBM MQ uses certificates Speaking of certificates Certificate attributes Types of certificate Ca/Browser who? What kind of cert for MQ? Walking through the process Setup & Debugging

4 A word about security These slides reflect the information available at the time of publication. With security, things change. Often quickly. Periodically check that you have the most current version of any reference materials. The latest version of this presentation will be posted at To be notified of updates via RSS or by , subscribe at the web site

5 A word about IoPT T.Rob left IBM to form IoPT Consulting in The firm offers The same MQ consulting services Security (of course!) Architecture High Availability Upgrades HA/DR Conventional + retainer engagements Troubleshooting Staff Augmentation MQ Security Guy Much more TROB (8762)

6 Anatomy of a certificate An identity & policies Bound to Public Key = Public certificate Your Public Certificate is what you present to others to authenticate yourself. The CA s Public Certificates are used to authenticate the signature of the certificates presented to you.

7 Anatomy of a certificate An identity & policies Bound to Public + Private key = Personal certificate Personal cert is used to [en de]crypt and establish secret keys.

8 How IBM MQ uses certificates: Server authentication QMGRB SDR Channel DATA Identity QMgr identity flows to partner QMgr and/or client for validation. QMGRA RCVR Channel Authenticates the server. Optionally provides privacy (encryption) and/or data integrity on the channel. This is the least level of service provided by TLS over MQ channels. Client over SVRCONN Channel

9 How IBM MQ uses certificates: Mutual authentication QMGRB SDR Channel Identity DATA QMgr identity flows to partner QMgr and/or client for validation. QMGRA RCVR Channel As before but adds client authenticity. This is the least level of service provided by TLS over MQ channels. Client over SVRCONN Channel

10 Speaking of certificates A self-signed certificate is one where the key in the certificate is the same one used to sign the certificate.

11 Speaking of certificates A Root certificate is a self-signed certificate enabled for signing other certificates.

12 Speaking of certificates Signing Request CA Signer User or App

13 Speaking of certificates Trust & Validation S i g n i n g CA Root CA Signer User or App The CA Root Certificate MUST be in the trust store. That s how we know to trust it. V a l i d a t i o n

14 Speaking of certificates Keystore/trust store A keystore is a place to keep keys and certificates. A trust store is a keystore that contains only public certificates the trusted entities. MQ uses.kdb files.jks (for Java) keystores.

15 Certificate attributes Distinguished Name Validity period Key, key length, key type Serial number Fingerprint Signature algorithm and details Revocation responder URI Policies Can it sign other certs? Can it sign signer certs? Can it encipher communications?

16 Certificate attributes Two sets of attributes in the certificate: Subject owner of the certificate Issuer signer of the certificate For CA-signed certificates, the issuer is the certificate used to sign the one being examined The Issuer info is present on root and other self-signed certs, it matches the Subject info

17 Types of certificate Three types of certificate: Domain Validated (DV) Certificate Organizational Validated (OV) Certificate Extended Validation (EV) Certificate Granularity of the certificate: Standard certificate Wildcard Certificate Unified Communications (UC) Certificate

18 Types of certificate Standard certificate ioptconsulting.com, Wildcard Includes all subdomains E.g. *.ioptconsulting.com Unified Communications Certificate (UCC) Up to 99 domains in Subject Alternative Name Very common for cache servers and CDNs

19 Types of certificate DV vs. OV VS. EV Certs DV Certificate verify only that the owner of the domain approves the request. OV Certificate public DB search to validate company and domain name EV Certificate Closer to an actual background check

20 Types of certificate DV vs. OV vs. EV Certs Level of service by cert type: Source:

21 Types of certificate DV vs. OV vs. EV Certs Because the DV and OV certificates have minimal validation, attributes other than the Common Name and the Subject Alternative Name are deleted if requested! Those useful OU fields? Fugeddaboudit!

22 Types of certificate DV vs. OV vs. EV Certs Your requested OU fields might even be wiped out on an EV cert! Because the CAB Forum believes their only customers are web servers and browsers. Those useful OU fields? Ask before dropping big money on an extended validation cert!

23 Ca/Browser who? The CA/Browser Forum is the consortium that sets the standards and policies all member CAs and browser vendors follow. They don t recognize the need for certificates for any entity more granular than a fully qualified domain name or address, which is unfortunate for those of us administering anything else that needs to be authenticated or encrypted. Like a QMgr on the internal network.

24 What kind of cert for MQ? Any standard web server cert will work. EV useful if the CA lets you specify OUs For external connections, EV may be helpful Wildcard certificates not helpful at all Because MQ doesn t do the same DN and SAN that browsers perform UC Certs may be helpful Stash OU info into SAN i.e prod.qmgr.dom.tld Extra expense

25 Walking through the process 1. Define the KDB or JKS 2. Generate a Cert Signing Request (CSR) 3. Submit the CSR to the CA 4. Download the signed cert & signer bundle 5. Receive the signed cert into the KDB or JKS 6. REFRESH SECURITY TYPE(SSL) or bounce the application to pick up the new keystore 7. Configure the channels

26 Walking through the process No special requirement to generate a key pair and signing request. Can do this with an empty JKS or KDB.

27 Walking through the process CA Signer The CA Root must be in the keystore before receiving the cert returned from the Cert Signing Request. User or App

28 Setup & Debugging DATA Identity Mutual authentication is where you end up. It is NOT where you begin.

29 Setup & Debugging Make life easier 1. Install MS0P if using MQ Explorer 2. Enable events for SSL, channel, and auths 3. Get the channel running without TLS 4. Enable server authenticated TLS 5. Enable mutually authenticated TLS 6. Enable CHLAUTH rules and/or exits Many people start at #5 and forget #6. Don t be that person!

30 Questions & Answers Two possibilities here: 1. You are asleep 2. Something needs clarification Because even if you are extremely good at understanding this stuff, I can usually do a better job explaining it. Please see my video series on this topic at:

31 Questions & Answers